“Tired of waiting for files to download? Shatter download rates and maximize your bandwidth,” says the developer of Speed Download, YazSoft. They continue, “Packed with tons of features, Speed Download is the ultimate, must-have download manager for the Macintosh hands down! Speed Download ensures that you always get the fastest download speed from your internet connection every single time you download a file and no matter what browser you use.” More info and download link here.
Does it work for you?